Outgoing mail via "AT&T Servers" problem

Outgoing mail via "AT&T Servers" problem

Since 10/2/12 I've [and others] been unable to SEND mail via ANY of the AT&T servers [outbout.att.net, pop.att.yahoo.com, etc.] . I can receive mail fine, but I've had to send mail via another acount. I've seen other posting where almost all other users of Apple Mail [version doesn't matter] are having this problem as well as users of other client; Why can not this problem be resolved?

Re: Outgoing mail via "AT&T Servers" problem

Oh no that didn't work? Please send a private message by using the following link to one of our top notch ATTCustomer care agents and they will work with you directly to try and resolve this issue. Please include your name, email address, telephone number and the best time you can be contacted. Thank you so much.